When you gain this, if you have at least 5 Action cards in play, +2VP.
Emporium is an Action card from Empires. It is a Peddler variant that gives you a VP token(Victory token)s bonus when you gain it, if you can get a lot of Actions in play first. It is a split pile card, with 5 copies of Emporium sitting under 5 copies of Patrician.